Free flow liquid fuel filter



Aug. 10, 1943. w. s. SCHUM 2,326,691

- FREE FLOW LIQUID FUEL FILTER Filed April 7, 1941 /6Z3 Z2 25 72-93:]. M

' WSSb/zum awaawzg i Figure 2 is a sectional view. taken on the PatentedAug. 10, 1943 UNITED STATS] [ewes aszaear FREE new moon) FUEL f I pWalter s. Schum, gamers, re. Application Aprils, 194i, Serial-No. street2 Claims. (c1. zicitsi f j This invention relates to liquid filters, andmore particularly to a filter for liquid fuel, such as gasoline or thelike. r I

An object of this invention is to provide afiltering device including awell or reservoir and a cap on the well, the cap including a filterelement and abafileadjacent the element so that the incoming fuel willflow from-the intake downwardly into the well where the sedimentandwater will separate or settle from the liquid, and then the liquidwill flow upwardly into the cap on the pposite side of the baffle andpass through a' filter element which is adapted to remove any floatingsediment which may be stirred ,upfromthe settling' receptacle or may betoo light to settle.

. body 58, is provided with a dome-shaped topt'wall V l and is providedat the lower endof thecylindrical side wall 2 with an outwardlyextending flange id Aniannular flange ll disposedat right angles to theflange 16 is formed integral with theflange iii-and is provided. withinterior threads "ls'whichiare adapted to engage exterior threads l8,which are formedonthe receptacle ll adjacent. the upper end-"portionthereof: An annular Cr ring-shaped gasket 29. is interposed between theflange it and the upper edge of the-receptacle I, so'as to providealiquid seal atthe upper end 7 of the receptacle '8 i= and thelo'wer'end'of-the cap Another object of this invention is to provide afiltering device of this kind'which maybe interposed in a fuel line oneither side of .thefuel pump and which will give a visible indication ofthe condition of the fuel and the amount of sediment in the receptacle.e

A further object of this invention is to provide a filtering device ofthiskind wherein the filtering element'may be readily removed forcleaning or replacement and which includes a means for holding thefiltering element against collapsing. To the foregoing objects and toothers which Ina-y hereinafter appear, the invention consists of thenovel construction, combination and arrangement of parts as will be morespecifically V referred to and illustrated in the accompanying drawing,wherein is shown an embodimentof the invention, but it is tobe'understood-that changes, variations and modifications may be resortedto which fall within the vention as claimed.

In the drawing: Figure 1 isa vertical to an embodiment"ofthis'invention,

2'2 of Figure 1, and V Figure 3 is a sectional view taken on the line3-3 of Figure 1 with the filter element removed from thesupportingframe'or cage. 1

Referring to the drawing'the-numeralw desig 1 nates generally a capstructure which'is mounted on a transparent receptacle or; sedimentoollector H. The cap liiincludes a cylindrical body !2-, which isprovided adjacent the upper end por- 7 tion thereof with an intakenipple l3 andat a scope of the in} 7 section taken-'tlirough a free flowliquid fuel filter constructed according line I or' filtering body is;i 1. I

'The body or c'ap it is provided inwardly from the intake nipple it witha transversely arcuate with tli'e'receptaclell; I 1

with the outlet nipple l4 and the panic 25 is inglined in a directionvopposite from the inclination of the'baflle Elyas shown in Figure 2. Thebame ZE'has secured thereto a cylindrical nipple Z'L-Which' isform'ed'with an L-shaped slot 28 opening through the'inner end portionthereof. Afilter element; generallydesignated as 29,; is

' adapted .to remo vaoly engagethe nipple E'I'and diametrically oppositepoint with an outlet nipple Hi. 'I'he'nipples i3 and M are adapted to beinterposed in a fuel line and preferably are interposed in the intakeside of the fuel pump." The cage, generally designated as I the couplingsleeve 51 and ;comprisesa plurality. of looped radially arranged wires34', which are 'to extend inwardly ofthe outlet chamber 30 V formedbetween the convex sides pr 1 the ftwo baiiles' ii and 25.

' The filter-ingelement 29 includes afcylindrical 1 7 base or couplingmember Sijwhich is provided;

. with apm sz engageable in the; L' ishapedsl'ot 28fs s so as totherehyhold the sleeve or coupling mam herffil within "the "sleevei'or.nipple'Z'L -A wire secured to the inner end portion of the sleeve 3 I,as at 35, and which have theirouter end por it is 3130' provided with a"second-transversely 'arcuate combinedbaflle v manner element supportingmernoer25, which is secured'to thetop walljiii and the side wall l2.

ThebaflleZii has-the concaveside thereof confronting theoutletport Z5,whichc0mmunicates '1 is secured to 31, the cage 33 and the couplingsleeve 3!. The

the inner end portion of the sleeve 3| and secured thereto bya removableclamping band or wire 38; The filtering element-31 may be in the form ofa chamois or other pervious means which will permit the passage of fueltherethrough; but which will remove any foreign matter within the fuel.

The receptacle l i is provided with a concave bottom wall 39 formedintegral with the side wall 40 thereof and a drain cock 4| is mounted inan opening 42 provided in the center of the bottom wall 39. The draincock M is secured in the opening 42 by means of inner and outer clampingnuts 43 and 44. Preferably a gasket'45 is interposed between the nut 43and the inner face of the bottom wall 39 and an outergasbety isinterposed between the outer or lower nut 44 and the outer side of thebottom wall 38;

.In the use and operation of this filtering deevice the filtering heador cap in is adapted to interposed in a suction fuel line, preferably onthe suction side of a. fuel pump or the like. The suction frornithe pumpwill draw the liquid from outlet chamber which is positioned between theconcave side of the battle 2i and the outlet'port 26. The liquid fuelwill be. drawn through the filtering element til-from the outlet chamber38. The incoming fuel will enter thernpple13 and pass through the intakeport 48 into thebaffle chamber 49 The fuel will thenflc-w downwardlysnd'entcr the receptacle H through the passage 24; The incoming fuelentering the receptacle filter element 31 may then be removed from thecage 33 by looseningclamping band 38 and a new or clean elementsubstituted therefor.

What I claim is: i

1. In a fluid filtering device, a lowerreceptacle open at its upper end,an inverted upper receptacle secured to the upper end of said lowerreceptacle, said upper receptacle including a cylindrical side wall anda dome-shaped top wall, an

inlet nipple carried by said side wall adjacent the upper portionthereof, an outlet nipple diametrically opposed to said inlet nipple, anelongated baflie fixed along its longitudinal and top edges to the innersurfaces of the side and top walls and inclined upwardly and inwardly,the lower edge of said bafile being spaced from said 7 side wall tothereby provide a lower outlet comwill then rise into the outlet chamber30 In operation the entire filtering structure will be filled with aliquid which willflow frmnthe intake port" to the outlet port.

The heavier sediment including globules of water will be deposited inthe concave'side of the bottom wall 39 of the receptacle H and maybedrained from the receptacle by opening the petcock 4!. In the event itis desired to thoroughly clean the rece tacle H this receptacle maybeunthreaded from the hood orcap land then emptied from the upper :endthereof and cleaned The receptacleH with a rag or other implement. v ispreferably formed of transparentmaterial -50 that the condition of :thefuel, therein will be readily visible so that the user of this devicecan determine the necessitycf cleaning the device without-first removingthe receptacle H;

The provision of the open cagestructure 83,

which engages within thefilter element i'l will provide a means wherebythe filter element ma y beof'fiexible material and the flexible materialwill be held against collapsing by meansof the open cage structure 33.This device may. be

manufactured at a relatively small cost anddu to the simplicity thereofit can b readily com heated-with the fuel line of an internalcombustionengine without disturbing. any of the present parts of the engine. Whereit is necessary or desirable to either clean or-replace' the filterelement 31, this may be readily, done by removing the receptacle I I andthen disconnecting the 70 filtering member-29 including the filterelement municating with said lower receptacle, said baflle at its upperportion confronting th inner end of said inlet nipple and forming aninlet chamber, said inlet chamber gradually reducing toward said loweroutlet, a second baifie fixed at its lower and side edges to said sidewalland fixed at its upper edge to said top wall at a point spaced fromthe upper edge 01' said first bafile, said second baflle being inclinedupwardly and inwardly and confronting the inner end of said outletnippleto thereby form an outlet chamher, a downwardly ,andjinwarcllyinclined nipple carried by said second battle, a flexible filter in-gelement, and frame-like 'means' supporting saidelement fromv said latternipple-said supporting means disposing said element on a downwardly andinwardly disposed inclination en- V tirely within said upper receptacle.

- *2. In a fluid filtering device, a lower recep- 7 upper portionthereof, an outlet nipple diametrically opposed to said inlet nipple, anelongated baiiie fixed along its longitudinal and top edges tothe innersurfaces of the side and top walls and inclined upwardly and inwardly,the loweredge of said bafllcbeing spaced from said side wall to therebyprovide a lower outlet communicating with saidlower receptacle,saidbafile at its upper portion confronting the inner end of said inletnipple andforming an inlet, chamber, said inlet chamber graduallyreducing toward said lower outlet-a second baflle fixed at its lower andside edges to said sidewall and fixed at its'upper edge to said top wallat a point spacedfromthe upper edge of. said first baflle, said secondbafile being inclined upwardly and inwardly and confronting theinnerend. of said outlet nipple to thereby form an outlet chamber,said-first and second bafiles being of transversely arcuate configuration with the concave sides facing outwardly, a downwardly and inwardlyinclined nipple carried by said second baflle, a flexible filteringelement, and frame-like means supporting saidelement from'said latternipple, said supporting means disposing said element 011B; downwardlyand ini wardly disposed inclination entirely within said upperreceptacle 7 i WALTER S. SCHTJ M.

